Improvement in pumps



UNITE STATES ArENT EErcE.,

ADAM SQGAMERON, oF NEW YORK, N. Y.

IMPROVEMENT iN PUMPS.

To all whom it may concern:

Be it known that I. ADAM S. CAMERON, of the city, county, and State ofNew York, have invented certain new land useful Improvements in Pumps,whereby steam or other power pumps of any capacity can be operated byhand, whatever their construction or size may be; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the annexed drawings, making a part ofthis specieation, in which- 'Figure 1 is a longitudinal elevation,partly in section, of a direct-action steam-pump iitted, with myimprovement. Fig. 2 is a plan view of the same.

Similar letters oi reference indicate corresponding parts in bothfigures.

On board of steam-vessels and in other places where steam-pumps are usedit has been generally impossible to dispense entirely with thehand-pump, for there are many circumstances under which a pump isrequired when steam is not up, as in the case of a steamship in port,when it is required to pump bilge, wash decks, extinguish a lire, orfill or discharge boilers. In order to dispense with a separatehand-pump with all its valves, pipes, and other appurtenances, steam-pumps have been arranged to work by hand, as may be seen by referenceto the patent granted to Wm. Sewell and myself, dated May 10, 1864. Thishas been accomplished by disconnecting the steam and pump pistons onefrom the other and working the pump-piston by hand, which is a veryexcellent arrangement, and has met with the most decided success; butvery large pumps can seldom be operated in this way, inasmuch as thepower required to operate them is greater than can Abe convenientlyapplied by hand 5 and, furthermore, there are other pumps of suchconstruction that this principle of disconnecting the piston cannot besuccessfully embodied in th em.

The object of my invention is to overcome all of these difficulties; andmy invention, which may be applied to any power-pump of any size orconstruction, consists, principally, in attaching an additional cylinderand piston to the main cylinder of a power-pump in such a way that thevalves and pipes of the said main cylinder also act in conjunction withthe piston of the additional cylinder in working the same by hand.

To enable others skilled in the art to make and use my invention, Iwillproceed to describe it with reference to the drawings.

A represents the bed-plate, C the steam-cylinder, and Bn thewater-cylinder, of a steampump fitted with my improvement. D is thevalve-chamber ot the pump-cylinder B, with the additional cylinder Eplaced outside of it provided with passages c at either end common tothe one set of induction and eduction valves of the main cylinder B. Jis a cross-head secured 011 the piston-rod F of the main pump B. G is aslide attached to the bed-plate, and arranged to be adjustedtransversely to the movement of the piston, for holding the saidcross-head stationary when desired, being provided for the purpose witha notch, s, in its inner edge. H is a lever to operate the piston I ofthe additional cylinder when working the pump by hand, at which time thesaid lever is attached to the said cross-head J by its fulcrum-pin 7c,and to the piston-rod I of the pump E by a pin, t.

When it is desired to operate the piston I by handthe cross-head J ismoved opposite the slide C, that the notch s, in its forward end, may,by pushing in the said slide, be made to receive the cross-head and thussecure the main piston F from moving. The crosshead having been thussecured,'the lever H is placed in a proper position and its lower endpivoted to the cross-head J by the fulcrumpin 7c, as shown in blackoutline in Fig. 1. When, by moving the lever H to and fro in a planeparallel with the axis ofthe cylinder, the pump formed by the additionalcylinder E, its piston I', and the valves of the main cylinder is workedby hand, it will be seen that the cross-head J serves two purposes-viz.,that of securing the main piston F against any movement produced by thepressure upon it ot' the water set in motion by the piston I and as asupport for the fulcrum of the hand-pump lever H.

When it is desired to increase the capacity ofthe pump both punip-pistons can be operated together by the steam-piston in this way:Insert a pin through holes in the cross-head .T and lever H at m m', aswell as the pin at 7c, as shown in red outline in Fig. l, thus securingthe lever H rigidly to the cross-head J 5 then move the slide Gr back torelease the hold upon the cross-head, apply steam to set` 2 Y l Y 54.291

the steam-piston in motion, and the piston I of the additional orhand-pump cylinder will be carried back and forth with the main pistonF. The same set'of Valves in this operation serves for bothpump-cylinders. When it is desired to work the steam-pump alone the pinat m m and the pin 7c are both removed and the lever H is turned oversidewise to bring its upper end, resting in a notch, d d, in the side ofthe bed-plate, as shown in Fig. 2, and the said lever, being firmly heldin this notch, prevents the piston I of the hand-pump from being movedby the pressure of the water set in motion by the main piston F.

What I claim as myinventi0n,and desire to secure by Letters Patent, is-

1. The combination ot a steam or power pump and auindependently-operating handpump with one set of valves which is commonto both pumps and capable of operating` with either, as may be required,substantially as herein specied. Y

2. In combination with a power-pump and a separate hand-pump having ones et of valves common to both, a cross-head which serves both thepurpose of holding the power-pump piston stationary and of a support forthe fuli crum of the hand-pump lever when the latter pump is at work,substantially as herein described.

A. S. CAMERON. Witnesses:

J AMES A. Wm'rNEY, GEO. W. REED.

